Aerial images of the Golden Triangle Special Economic Zone (GTSEZ) in the Bokeo province on Laos taken from the Thailand side, in Chiang Saen. The GTSEZ is the most prominent of more than 90 such areas established across the Mekong region in recent years, often offering people reduced taxes or government regulation. Analysts say the towers are leased out as centres operating finance and romance scams online, a multibillion-dollar industry that shows no signs of abating despite Beijing-backed crackdowns in the region. STOCKSHOTS